package com.sky.service.impl;

import com.sky.context.BaseContext;
import com.sky.dto.ShoppingCartDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.ShoppingCart;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.service.ShoppingCartService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
@Slf4j
public class ShoppingCartServiceImpl implements ShoppingCartService {
      @Autowired
      private ShoppingCartMapper shoppingCartMapper;
      @Autowired
      private DishMapper dishMapper;
      @Autowired
      private SetmealMapper setmealMapper;
    //添加购物车
    @Override
    public void addShoppingCart(ShoppingCartDTO shoppingCartDTO) {
        //判断当前加入到购物车的商品是否在购物车中
         ShoppingCart shoppingCart=new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO,shoppingCart);
        Long userId= BaseContext.getCurrentId();
        shoppingCart.setUserId(userId);
      List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
        //如果存在，购物车数量+1
       if(list!=null&&list.size()>0){
           ShoppingCart cart = list.get(0);
           cart.setNumber(cart.getNumber()+1);
           shoppingCartMapper.updateNumberById(cart);
       }else{
           //不存在，插入一条购物车数据

           //判断本次添加到购物车的是菜品还是套餐
           Long dishId = shoppingCartDTO.getDishId();
           if(dishId!=null){
               //添加到购物车的是菜品
               Dish dish = dishMapper.getById(dishId);
               shoppingCart.setName(dish.getName());
               shoppingCart.setImage(dish.getImage());
               shoppingCart.setAmount(dish.getPrice());
               shoppingCart.setNumber(1);
               shoppingCart.setCreateTime(LocalDateTime.now());
           }else{
               //添加到购物车的是套餐
               shoppingCart.setDishFlavor(null);
               Long setmealId = shoppingCartDTO.getSetmealId();
               Setmeal setmeal = setmealMapper.getById(setmealId);
               shoppingCart.setName(setmeal.getName());
               shoppingCart.setImage(setmeal.getImage());
               shoppingCart.setAmount(setmeal.getPrice());

           }
           shoppingCart.setNumber(1);
           shoppingCart.setCreateTime(LocalDateTime.now());
           shoppingCartMapper.insert(shoppingCart);
       }
    }

    @Override
    //查看购物车
    public List<ShoppingCart> showShoppingCart() {
        //获取到当前微信用户id
        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = ShoppingCart.builder().userId(userId).build();
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
        return list;
    }
  //清空购物车
    @Override
    public void cleanShoppingCart() {
        //获取到当前微信用户id
        Long userId = BaseContext.getCurrentId();
        shoppingCartMapper.deleteByUserId(userId);
    }
}
